Returns The 'EntityType' OData element associated with the reference argument. 
      Syntax
         
         
            public 
            abstract IODataEntityType  
            getEntityType
            (
            String 
            entityTypeReference
            )
         
      
      Parameters
         
         
            - 
               entityTypeReference – 
               Reference to the appropriate Entity Type (example: 'namsepace.entitytypename')
            
 
         
       
      Returns
         The 'EntityType' OData element associated with the reference argument